Alan Dershowitz warned that many of those tearing down Confederate and other statues are trying to take America down with them.

"Antifa is a radical anti-American, anti-free market, communist, socialist, hard, hard left censorial organization that tries to stop speakers on campuses," the Harvard law professor emeritus told "Fox & Friends" on Tuesday.

The violent anti-Trump group participated in riots responding to the violent white nationalist rally that left one dead in Charlottesville, Virginia earlier this month. The riots left statues from Confederate generals to Christopher Columbus to Abraham Lincoln defaced and in some cases torn down.

Dershowitz noted that some statues put up during the Civil Rights era were meant to intimidate. Those should perhaps be moved to museums, he suggested, to teach students about how statues can be used for bad purposes.

However, doing "what Stalin did, just erasing history and rewriting it to serve current purposes does poses a danger" and amounts to "educational malpractice," the lawyer said.

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"Once you start rewriting history of African Americans in this country, you have to start rewriting history of discrimination against many many other groups," he said. "We're both a nation of immigrants and a nation of discrimination against immigrants."

"I'm a liberal, and I think it's the obligation of liberals to speak out against the hard left radicals just like it's the obligation of conservatives to speak out against the extremism of the hard right," the lifelong Democrat stated.

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